Is it just expected that people ninja in UBRS?

Hear me out -

Over the weekend I got my Onyixa attunement done so I had to do UBRS 3 times. I decided to pug just to get it done quicker.

2/3 said they were hard res. All 3 switch to ML at the last boss. All 3 just took stuff. No one says anything. Nothing dropped that was HRed.

Is it just expected that people ninja in UBRS? (Ambershire)